149221440 has 336 divisors, whose sum is σ = 565830720. Its totient is φ = 37324800.

The previous prime is 149221379. The next prime is 149221453. The reversal of 149221440 is 44122941.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1477390 + ... + 1477490.

It is an arithmetic number, because the mean of its divisors is an integer number (1684020).

Almost surely, 2^149221440 is an apocalyptic number.

149221440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282915360).

149221440 is an abundant number, since it is smaller than the sum of its proper divisors (416609280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

149221440 is a wasteful number, since it uses less digits than its factorization.

149221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 149221440 is about 12215.6227839599. The cubic root of 149221440 is about 530.4084190224.

The spelling of 149221440 in words is "one hundred forty-nine million, two hundred twenty-one thousand, four hundred forty".